CAYLEY 2021 Problem 18

Elina and Gustavo leave Cayley H.S. at 3:00 p.m. Elina runs north at a constant speed of 12 \mathrm{~km} / \mathrm{h}. Gustavo walks east at a constant speed of 5 \mathrm{~km} / \mathrm{h}. After 12 minutes, Elina and Gustavo change direction and travel directly towards each other, still at 12 \mathrm{~km} / \mathrm{h} and 5 \mathrm{~km} / \mathrm{h}, respectively. The time that they will meet again is closest to

Answer Choices
A. 3:24 p.m.
B. 3: 35 p.m.
C. 3: 25 p.m.
D. 3:29 p.m.
E. 3: 21 p.m.